I have never used aftermarket gauges before so bear with me if these are stupid questions. I am not putting any fancy gauges in just the water, oil temp and oil pressure as well as a fuel to air ratio. I was wondering if I have to buy the senders for them or if I use the existing ones in the tC?(which would be very nice if I can!)

I am not sure that the tC has an oil pressure/temp sender already or not but I know it has an O2 sensor for the fuel/air ratio and a water temp thermometer.

Please let me know what I would have to purchase to hook these gauges up in the tC!

 

Normally Gauges like Auto Meter come with the stuff you need, I did a DIY about this a while ago...

https://www.scionlife.com/forums/viewtopic.php?t=67002